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Code P20FE

Quick reference

P20FE at a glance

Plain-language meaning
This code means that the part of the car that helps reduce pollution from the exhaust isn't working as well as it should. It's like when a toy's battery is running low and it doesn't work properly.
Urgency
Moderate – It should be addressed soon to avoid increased emissions and potential engine performance issues.
Difficulty
Moderate
System
Emission Control System
Tools mentioned
OBD-II scanner, Multimeter, Wrench set

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means that the part of the car that helps reduce pollution from the exhaust isn't working as well as it should. It's like when a toy's battery is running low and it doesn't work properly.

Explanation

The reductant metering unit is responsible for controlling the amount of diesel exhaust fluid injected into the exhaust system to reduce emissions. This code indicates a performance issue with this unit.

Technical description

The P20FE code is set when the Engine Control Module (ECM) detects that the reductant metering unit is not performing within the expected parameters. This could be due to a malfunction in the unit itself, a blockage, or an issue with the control signals.

Symptoms

• Check Engine Light is on

• Reduced engine performance

• Increased emissions

Common Causes

• Faulty reductant metering unit

• Blockage in the reductant line

• Electrical issue with the control circuit

Glossary

Reductant: A substance used to reduce emissions in a vehicle's exhaust system, often diesel exhaust fluid.

Metering Unit: A component that controls the flow of a fluid or gas.

Diagnosis steps

• Verify the presence of the code with an OBD-II scanner.

• Inspect the reductant metering unit and related components for damage or blockage.

• Check the electrical connections and wiring to the unit.

Repair procedures

• Replace the reductant metering unit if faulty.

• Clear any blockages in the reductant line.

• Repair or replace damaged wiring or connectors.

Tools required

• OBD-II scanner

• Multimeter

• Wrench set

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-250

• Chevrolet Silverado

• Ram 2500

Preventive measures

• Regularly check and maintain the exhaust system.

• Use high-quality diesel exhaust fluid.

• Perform routine vehicle maintenance.

Error code type

Emission Control System

User experience recommendations

• Avoid driving long distances until the issue is fixed.

• Consult a professional mechanic for diagnosis and repair.

Warranty information

Check with the vehicle manufacturer for warranty coverage on emission control components.

Historical data

The P20FE code has been associated with vehicles equipped with diesel engines and selective catalytic reduction systems.

Urgency level

Moderate – It should be addressed soon to avoid increased emissions and potential engine performance issues.

Testing conditions

• Engine running at operating temperature

• Vehicle in motion

Component location

The reductant metering unit is typically located near the exhaust system, often mounted on or near the diesel exhaust fluid tank.

FAQs

Q: Can I drive with a P20FE code?
A: It's possible to drive with this code, but it's not recommended as it can lead to increased emissions and potential engine issues.

Q: How do I clear a P20FE code?
A: You can clear the code using an OBD-II scanner after addressing the underlying issue.

Optional diagnostic gear

Tools that may help diagnose P20FE

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

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Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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